Mounting for rock drills



May 1.5, 1928. 1,669,466

c. @HANSEN MOUNTING FOR ROCK DRILLS Filed Aug. 25, 1927 INVENTOR. @haras YHancs/em.

Patented May 15, 1928. l

UNITED STATES l. n l 1,669,466 PATENT OFFICE. y

CHARLES C. HANSEN, 0F EASTON, PENNSYLVANIA, ASSIGNOR TO INGERSOLL-RAND COMPANY, 0F JERSEY CITY, NEW JERSEY, A CORPORATION OF NEW JERSEY.

MOUNTING non :aoox maints.

Application iiled August 25, 1927. Serial No. 215,366.`

This invention relates to rock drills, but more particularly to a mounting for supporting a plurality of rock drills of the drifter type.

The objects of the invent-ion are to enable a pair of rock drills to be supported in parallel spaced relation with respect to each other, toieiiable such rock drills to be advanced and retracted from the work as a unit, and to facilitate the operation of drilling and minimize the expense thereof whenever the work requires a series of closely spaced drill holes along a straight line, as for instance, in quarrying operations in which it is desired to remove the rock inv dimension blocks.

The usual form of procedure in removing rock by means of breaching steels is to first drill a series of closely spaced holes and after the desired number of holes have been drilled, to substitute broaching steels for the drill steel and thereby cut away the Walls between adjacent holes. ever, this method of quarrying has been confined largely to cuts in which the drilling apparatus could be maintained in substantially a vert-ical position, as the apparatus which has made this type of quarrying possible has been found to bel inadequate for severing the roel: along a vertical face. The present invention is particularly though not exclusively adapted to support the drills in the positions necessary for forming such cuts and contemplates the use of a suitable mounting clamped to the drills and cooperate slidably with the usual type of rock drill shell and its feed screw, whereby the inounting together with the drills may beadvanced and retracted with respect to the work.

In the drawings illustrating the invention and its inode of application,

Figure l is a partial end elevation and partly in section of the mounting. c

Figure 2 is a longitudinal sectional elevation taken through Figure l ony the line 2 2 looking in the direction indicated by the arrows, and

Figure 3 is a plan view of the mounting partly in section taken through Figure 2 on the line 3-3 looking in the direction indicated by the arrows.

Referring to the drawings in which is illustrated a practical application of the invention, A andB designate a pair of rock drills of the drifter type having the usual Heretofore, how-` feed screw lugs C. On opposite sides of the feed screw lugs C are located the guide ribs D which extend longitudinally of the cylinder E. The rock drills A and B may be ofy any conventional type in which the cylinder E, a front head F and a back head G- and other parts comprising the casing of the drill are held securely in operative positio-n by a pair of spring pressed side bolts H disposed on opposite sides of the drill.

In the front head F is disposed a drill steel J and at the rearward end of the back head are indicated the water tube parts K which may be of any well known type for introducing cleansing liquid through the drill steel J, thence into the drill hole for re moving the detritus therefrom, E

In accordance withv the present invention, means are provided for supporting the rock drills A yand B in parallel spa-ced relation with respect to each other and in such manner that both drills may be advanced towards the work as a unit. These means coinprise a carriage designated by L having a body portion O oneach side of which are a pair of lateral bearingsy l?. The bearings P `may be suitably spaced with respect to each other to accommodate the particular size and type of drills for which the mounting is intended and these bearings in the present instance are provided with grooves@ for the reception of the guide iibs D carried by the rock drill cylinders E.`

Suitable means are provided for clamping the feed sci'ew lugs C firmly against the rearward bearings P. These means consist in the present instance of a plate R of such proportions as to enable said plate to overv lap and engage the rearward ends of both of the feed screw lugs C. The plate R has an aperture S for the reception of a bolt T which extends through a lug U on the rearward end of the carriage bodyr O.l Anut V is threaded on the rearward end of the bolt T to clamp the plate R securely against the ,lugsv on the rearward projecting end "f the feed screw nut c. The `interior of the feed screw` nuto is suitably threaded to cooperate with a feed screw e for effecting relative longitu-` dinal i'novement betweenthe carriage L and the shell W.V The shell W 'andthe feed screw c may be `of a well known type in lwhlch the feed screw is supported rotatably `in front end of the shell and carries Vat its rearward end. a crank handle (not shown) whereby the feed screw c may be manually rotated. f

In assembling the and B may Vfirst vbe placed on the bearings P in such .ainan'nerthat the guide ribs D will be in slidable engagement with the grooves L In Vthis position 'of the rock drills, the feed screw 'lugs C willflie rearwardly of the rearward bearings P which 'they will abut in the assembled position. With the `drills thus disposed on the carriage L, the plate R maybe placed in position to lie against the rearward surfaces ofthe feed screw lugs C. Thereafter, thenut V may be threaded on the bolt lf to press the plate R lirn'ily against lthe feed `screw lugs C and thus clamp the carriage L and the rock drills A and B securely a gainst vrelative movement.

After the rock drillsand the carriage have been lassembled in the manner described, `the assembly may be placedin the "shell W so that the guide ribs X` of the'carriage L will be in slidable `engagement .with Vthe guideways Y of said shell.` :Bythus arranging -these parte, the feed *nut c will bein `the*correct position to Areceive the feed screw e in the usual manner. The `apparatus will then be in readiness for use and may he mounted on a suitable column or other support for the purpose described.

`LA mounting for a'plurality of: rock drills, comprising in combination with cylinders having lateral projections, a carriage,

` bearings on the carriage to support the drills,

i 'and a commonclamping means pressing on the projections to hold the drills against movement with respect to the carriage. Y 2. A mountingfor a plurality-,of rockV drills, comprising in combination with cylinders having atea, a@ mk dans it Y clamp the feed screw lugssecmrely indersfhaving feed screw lugs, fa carriage,

"bearin gs on the carri ageto support the drills,

and common means acting on the feed screw lugs'to 'clamp the drills `tothe carriage.,

, 3. A mounting :for` a plurality of rock drills, comprising in combination with cyl-` `lugs toclamp the drills securely to lithecarriage. y

4. A mounting for a plurality of `rock drills, comprising in combination with cylguide ribs andfeed lscrew` lugs,

a carriage, lateral bearings on the ycarriage having `grooves to interlock wi-tlithe guide ribs for holding the drills `in parallelfspaced relation with respect toleach "other, a plate bearing on the feed screw `lugs,"and means carried by the carriage actingon the plate y toclamp 4the feed screw lugs securely laetween the bearings `and said plate.

5; A mounting `for 'a plurality of rock `drills`,"co1n} 3rising in coinbinz'ttion with cylinders having guide ribs andfeed screw lugs, a carriage, lateral bearings `on the carriage having grooves yto interlock with the gu-ide ribs for holding the drills in parallel spaced relation with respect to eachother, aplate bearing on thefeed screwlugs1 means car-v ried the `carriage acting on the plate to lietween tlie'be'arings and said plate, and-guide `ribs "on the carriage sli'dably cooperating vwit-hthe giiiideways of arock 'drill shell.

16. `A mounting for a. plural-ityV of rock drills, comprising inv `comloination `with cyl inders having guider ribs and "feed screw lugs,a carriageliaving an aperture for the .receptionof a lfee-d scre-w-nut,`lateral bearings on the carriage having `grooves to interlock with'theguide ribsuforholding `the drills in parallel spacedfrelatmr with respect to each other, a plate bearing on `the` feed screw lugs, means carried by riage acting `on the plate Vto clamp the feed screw lugs securely between the bearingsand said 4vplate, and guide ribson the carriage slidably cooperating with theguirle'ways of Va rock 4drill shell. i

In testimony whereofl have signed `this specification.

CHARLES o. HANSEN. 

